Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
Studies on the Constituents of Iris florentina L. II. C-Glucosides of Xanthones and Flavones from the Leaves
藤田 正雄井上 隆夫
著者情報
キーワード: biosynthesis
ジャーナル フリー

1982 年 30 巻 7 号 p. 2342-2348

詳細
抄録

Four C-glucosylxanthones [Mangiferin (3), isomangiferin (2), 4 and 5] and three C-glucosylflavones [swertisin (6), isoswertisin (7) and isoswertiajaponin (8)] were isolated from the fresh leaves of Iris florentina L. (Iridaceae). The structures of 4 and 5 were shown to be 7-O-methylmangiferin and 7-O-methylisomangiferin, respectively, by chemical and spectroscopic methods. In addition, the 13C nuclear magnetic resonance chemical shifts of aryl carbons in these C-glucosylxanthones (2-5) were assigned. On the basis of the co-occurrence of several types of xanthone and flavone C-glucosides, the biosynthetic relationship between both C-glucosides is briefly discussed.

著者関連情報
© The Pharmaceutical Society of Japan
前の記事 次の記事
feedback
Top